Dust gun



All@ 8, 1944- R. J. WHITE 2,355,127

DUST GUN Filed June 7, 1941 2 Sheets-Sheet 1 F157- Z? Fig-J Y R. J. wHrrE 2,355,127

ATTOENP@ Patented Aug. 8, 1944 I 9 Richard J. White, New York, N. Y., asslgnor to American Can Company, New York, N. Y., a corporation of New Jersey y Application June '1, 1941, serial N0. 397,12o

2 Claims.

This invention relates to receptacles and the like for the storage anddissemination of insecticidal dust or powders and has particular reference to a combination telescopic container or dustv gun which may be used for any purpose where finely divided pulverulent materials are distributed in diffused form.

In dust guns or spraying devices which are used for the distribution of dust and powders,.it is essential that the' device be of such construction that a reciprocating movement of a plunger element will cause the dust or powder within the device to be emitted in the form of a cloud.

To accomplish this it is necessary that the air be forced into a cartridge portion of the device containing the powder vand under such conditions that a combined mixture of powder and air will be expelled under pressure from the device.

This is accomplished in the present invention by a reciprocating movement of the pump chamber under conditions which allow the passage of air between the plunger element containing the pump chamber and the cartridge containing the powder during a withdrawing or charging movement and will, during an opposite or compression movement, force the air into the powder and set up a mixture of air and powder which is then expelled from the device in a cloud or mist of the mixture which is deemed essential to procure a maximum coverage for the extermination of insects, bugs and the like.

An object of the invention is the provision of a telescopic compartment container which comprises a storage space or cartridge for holding a supply of powder or dust and a pumpv chamber which is adapted for movement with respect to the powder cartridgel as a pump gun to create a charge of air which is forced into and through the powder and which sets upA a turbulence of air and powder which mixture is expelled as a cloud through'a perforated wall -of the powder cartridge.

Another object of the invention is the provision of such a powder dispenser wherein the supply' cartridge is larranged with a flexible per-v forated disc at one end which acts Vas a valve to emit air into the powder supply but which when the valve isy closed prevents the leakage of powder from the inner container..

Another object of the invention is the proin which may be opened by simple rotary movement of the dredge and thereafter may be closed following a dispensing operation to prevent escape of the powder.

A further object of the invention is the provision oi a dredge construction which' is embodied in a plug insert such a plug insert, being engageable within a ring or end member so that the powder or dust may be filled in'to the empty cartridge by removal of the plug, thus permitting successive rellings of the powder. y

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment Y thereof.

Referring to the drawings:

Figure 1 of the drawings shows a filled and sealed container embodying the invention with parts broken away and with parts in section;`

Fig. 2 of the drawings illustrates the container shown in Fig. 1 with'certain container parts in extended position, as during a dispensing operation;

Fig. 3 is a top plan view of the container;

Fig. 4 is a transverse view in sectionof theV container as viewed substantially along the line 4 4 of Fig. 1 and showing the perforated flexible valve; A

Fig. 5 is an enlarged fragmentary lview in section taken substantially along the line 5 5 in Fig. 3;

Fig. 6 is a view similar to Fig. 5 as viewed substantially along the line 6-6 in Fig. 4;

Fig. 'l is a view similar to Fig. 3 showing an alternative form of end construction; and

Fig. 8 is an enlarged 'fragmentary sectionof the upper or discharge endof the modied container as viewed along the line 8 8 in Fig. 7.'

As a preferred embodiment of the invention the drawings disclose an inner fibre container body II and a two part outer fibre container body I2. The container body II has a sheet metal bottom end I3 secured thereto in an end joint I4, as best illustrated in Fig. 6 of the drawings. top metal end I5 is secured to both the inner container II,-and to the upper part of the outer container I2 in an end seam joint as at I6. vAn

vision, in the dust gun or powder dispenser of imperforate bottom metal end member I1 is secured to the lower part of the outer container I2 in-a bottomI and joint as at I8. v

A decorative label or wrapper I9 setting forth descriptive or advertising matter regarding the container contents is secured to 'and holds toouter container body i2 preferably abut at the marked region of the label so thatV the lower or major portion of the outer container may be withdrawn in telescopic manner relative to the inner container body after severing the label so as to provide'a plunger element for the combinationor assembly. The remaining portion of the outer container is secured upon the inner container I I by a plurality of staples or rivets 23 in addition to the end seam IB at the discharge end of the container (Fig. 2).

The top end member I (Figs. 3 and 5) has a dredge 24 centrally disposed Within a sunken panel of the end. The dredge 24 is. secured rotatably to the end member by lugs 26 struck from the material of the end. Such a dredge may be rotated, by means of extended nger lugs 21, to bring a plurality of openings 28 in the dredge into or out of register with a plurality of similar perforations cut in the end.

A flexible 'disc 29, preferably formed of paper. serves as a'valve for admitting air into the powder cartridge (designated by the numeral 32) which is provided by the inner container body II with its bottom and top ends I3 and l5. The flexible disc 29 has a plurality of small openings 33 (Fig. 4) formed in a circle concentricwith the ,center f of the disc. Such a flexible disc is located upon the bottom end i3 its periphery being embodied in the end seam joint I4.

Thebottom end i3 is cut through with a central opening 3d. The end joint preferably is formed with an outside diameter of the same exterior dimension as the exterior dimension of the inner tubular body i I. In other words, the seam It is a flush joint so that the outer container body may have sliding movement over the inside container body il and over the powdercartridge contained therein.

Such a combination container unit is assembled prior to filling rst by having both the inner and outer fibre container bodies l i and I2 joined with their respective ends i3 and il. The two sections of the body i2 are a single composite unit at such a time, the label i9 holding the parts together.

g The inner container body II with one end attached next is inserted within the outer container body I2. When thus assembled a desired number of staples 23 may be inserted, being driven in from the outside, to secure the inner body I I and the composite outer body I2 together as a unit.

The assembled container now is read.; to be filled with pulverulent powder or dust material 38. After filling, the metal end I5 with its dredge 24 previously assembled (as shown in Fig. 3) then is applied to the double stapled walls of the inner body II and upper body I2 and the end ange is spun or crimped in place to produce the end seam I6. With the dredge 25 in a closed position upon such an assembled container, the contents are sealed in and may be stored for an indefinite period.

When the container is to be placed in service the label I9 is severed along the marked line 22. This separates the two parts of the outer body I2 and detaches the lower major portion for sliding movement on the inner container body ll containing its cartridge of powder, the top and bottom end members I3, I5 as well as the upper part of the separated double body I2. The dredge 24 next is rotated in position so that the perforations 28 are brought into registration with openings in the end member I5. This prepares the container for dispensing its contents as a dust spray or dust cloud. y

The separated major portion of the container body I2, with its end member I1 is used as pump element 31 and when it is withdrawn or slid back over the inner container body II, the air seeps in between the inner surface of the body I2 and the outer surface of the body II passing into a pump chamber 38. Chamber 38 is outlined by the lower body I2 with the end member I3 for its top and end member I'I for its bottom. When the pump element 31 is moved in an opposite direction, i. e. back to its former position, the air within the pump chamber is compressed and is forced through the opening 34 in the end I 3 and against the lower surface of the paper disc 29. This fiexes the paper disc and as it is lifted at the center, the openings 33 are uncovered and the air escapes through the openings into the cartridge containing the pulverulent material l36. This air stirs up the material as it permeates the mass and expels a. charge of such mixture through the perforated openings in the end l5 and through the dredge openings 28 as shown in Fig. 2.

Figs. 7 and 8 of the drawings disclose a modied construction of the top end of the dispensing container. A metal friction ring 39 is substituted for the metal end I5. Such a ring has an opening 42 which is bordered by a depending wall 43. This forms a frictional seat for a friction plug insert 44.

Such a plug insert maybe provided with a dredge 45 which is similar to the dredge 24 also having openings as the openings 28 hereinbefore described. 'I'he dredge I5 is secured in a sunken panel in the plug insert in a rotatable manner the same as that described in connection with the dredge 24 (Figs. 3 and 5).

When a plug insert 44 is used in connection with a dispensing container of the class described, the metal ring 39 may be secured to the tubular bodies II and I2 in the can manufacturers plants by the usual form lof end seam being completed when shipped empty to the powder manufacturer. After the container is lled the plug member 44 is inserted in the usual manner and the filled container then is ready for storage and shipping.

When such a modified plug insert is used, the same dispensing container may be used repeatedly, for when the contents of the container is dispensed additional insecticide or pulverulent giaterial may be refilled into the cartridge cham- It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

l. A dust gun for storing and disseminating pulverulent materials under pressure, comprising an inner tubular container body member for holding the pulverulent product, a vtwo-part separable outer tubular body member enclosing said inner body with one part thereof slidablv mounted in telescoping relation on said inner body and having an imperforate bottom end member secured thereto, a perforated end member permanently seamed to said inner body and to a stationary part of said outer body at the discharge end of the gun to hold said members vagainst relative movement, said inner body having a bottom end member seamed thereto in an assale? end /joint and provided with a central opening,

and a flexible valve disc disposed within said inner body member adjacent said bottom end thereof normally closing said opening and having its periphery embodied in said end joint, said valve disc having an aperture spaced transversely from the opening in said inner' body'end member and normally closed by an imperforate part of the latter, the space between the respective bottom ends of said inner and outer body members constituting a pump chamber, whereby outward telescoping movement of the movable part of said outer bodymember admits air between said inner and outerbody members into said chamber, and inward telescoping movement of said outer body member forces the entrained air through said opening to ilex inwardly said valve disc and expose the aperture thereof, continued relative inward movement forcing the air through said aperture into the lpulverulent materials to expel the same in finely diifused and disseminated form through the perforations in the discharge end of said gun.

2. A dust gun for storing and disseminating pulverulent materials under pressure, comprising an inner tubular container body member for holding the pulverulent product, a two-part separable outer tu'blar body member enclosing said inner body with one part thereof slidably mounted in telescoping relation on said inner body and having an imperforate bottom end member secured thereto, a perforated end member permanently seamed to said inner body and to a stationary part of said outer body at the discharge end of the gun to hold said members against relative movement, said inner body having a bottom end member seamed thereto in ani' end joint and provided with a central opening,

said joint being flush with the outer surfaces of the inner body member to insure a snug telescoping t between said inner and outer body members, and a flexible valve disc `disposed withinsaid innerbody member adjacent said bottom end thereof normally closing said opening and having its peripherynembodied in, said end joint, said valve disc having a plurality of circumferentially spaced apertures spaced radially from said central opening in said inner body end member and normally closed by an imperforate part of the latter, the space between the respective bottom ends of said inner and outer v body members constituting a pump chamber, whereby outward telescoping movement of the movable part of said outer body member admits air between said inner. and outer body members into said chamber, and inward telesoping movement of said outer body member forces the entrained air through said opening to flex inwardly said valve disc and` expose the apertures thereof, continued relative inward movement forcing. the air through said apertures into the pulverulent materials to expel the same in nnely diffused and disseminated form through the perforations in the discharge end of said gun.

', RICHARD WHITE 

